International Conference for the Psychology of Mathematics Education Assisi, Italy, International Group for the Psychology of Mathematics Education, & Furinghetti, F. (1991). Proceedings -- fifteenth PME Conference: Assisi (Italy) -- June 29-July 4, 1991. Program Committee of the 15th PME Conference.
Cytowanie według stylu Chicago (wyd. 17)International Conference for the Psychology of Mathematics Education Assisi, Italy, International Group for the Psychology of Mathematics Education, i Fulvia Furinghetti. Proceedings -- Fifteenth PME Conference: Assisi (Italy) -- June 29-July 4, 1991. Assisi, Italy: Program Committee of the 15th PME Conference, 1991.
Cytowanie według stylu MLA (wyd. 8)International Conference for the Psychology of Mathematics Education Assisi, Italy, et al. Proceedings -- Fifteenth PME Conference: Assisi (Italy) -- June 29-July 4, 1991. Program Committee of the 15th PME Conference, 1991.